Meet the 30 sets of siblings who are competing in the Olympics together

Reuters/Ints Kalnins

Triplets Leila, Liina, and Lily Luik, of Estonia, will run the marathon in Rio.

Need proof that athletic talent runs in the family? There are at least 30 sets of siblings competing in the Rio Olympics together, including a handful of twins and triplets. 

Meet 61 brothers and sisters bringing family dominance to the Summer Games: